API tools faq
paste
Advertisement
vladikcomper

VDP managing macros

vladikcomper
Aug 22nd, 2013
322
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
Motorola 68000 HiSoft Dev 1.95 KB | None | 0 0
raw download clone embed print report
  1. ; =============================================================
  2. ; Macro to set VRAM write access
  3. ; Arguments:    1 - raw VRAM offset
  4. ;       2 - register to write access bitfield in (Optional)
  5. ; -------------------------------------------------------------
  6. vram    macro
  7.     if (narg=1)
  8.         move.l  #($40000000+((\1&$3FFF)<<16)+((\1&$C000)>>14)),($C00004).l
  9.     else
  10.         move.l  #($40000000+((\1&$3FFF)<<16)+((\1&$C000)>>14)),\2
  11.     endc
  12.     endm
  13.    
  14.  
  15. ; =============================================================
  16. ; Macro to set CRAM write access
  17. ; Arguments:    1 - raw CRAM offset
  18. ;       2 - register to write access bitfield in (Optional)
  19. ; -------------------------------------------------------------
  20. cram    macro   offset,operand
  21.     if (narg=1)
  22.         move.l  #($C0000000+(\1<<16)),VDP_Ctrl
  23.     else
  24.         move.l  #($C0000000+(\1<<16)),\operand
  25.     endc
  26.     endm
  27.  
  28.  
  29. ; =============================================================
  30. ; Macro to direct copy data into VRAM via DMA
  31. ; Arguments:    1 - Source Offset
  32. ;       2 - Transfer Length (in bytes)
  33. ;       3 - Destination
  34. ; -------------------------------------------------------------
  35. writeVRAM   macro
  36.     lea VDP_Ctrl,a5
  37.     move.l  #$94000000+(((\2>>1)&$FF00)<<8)+$9300+((\2>>1)&$FF),(a5)
  38.     move.l  #$96000000+(((\1>>1)&$FF00)<<8)+$9500+((\1>>1)&$FF),(a5)
  39.     move.w  #$9700+((((\1>>1)&$FF0000)>>16)&$7F),(a5)
  40.     move.w  #$4000+(\3&$3FFF),(a5)
  41.     move.w  #$80+((\3&$C000)>>14),-(sp)
  42.     move.w  (sp)+,(a5)
  43.     endm
  44.  
  45. ; =============================================================
  46. ; Macro to direct copy data into CRAM via DMA
  47. ; Arguments:    1 - Source Offset
  48. ;       2 - Transfer Length (in bytes)
  49. ;       3 - Destination
  50. ; -------------------------------------------------------------
  51. writeCRAM   macro
  52.     lea VDP_Ctrl,a5
  53.     move.l  #$94000000+(((\2>>1)&$FF00)<<8)+$9300+((\2>>1)&$FF),(a5)
  54.     move.l  #$96000000+(((\1>>1)&$FF00)<<8)+$9500+((\1>>1)&$FF),(a5)
  55.     move.w  #$9700+((((\1>>1)&$FF0000)>>16)&$7F),(a5)
  56.     move.w  #$C000+(\3&$3FFF),(a5)
  57.     move.w  #$80+((\3&$C000)>>14),-(sp)
  58.     move.w  (sp)+,(a5)
  59.     endm
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement
Public Pastes
Advertisement
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!